Single-phase permanent magnet synchronous motor and dust collector with same

Abstract

The invention provides a single-phase permanent magnet synchronous motor and a dust collector with the same. The single-phase permanent magnet synchronous motor comprises multiple types of stator teeth. The multiple types of stator teeth comprise first type of stator teeth; second type of stator teeth, the first type of stator teeth and the second type of stator teeth being encircled to form an annular working cavity for accommodating the rotor part. A uniform air gap radial thickness g1 is formed between the first type of stator teeth and the rotor part, a uniform air gap radial thickness g2is formed between the second type of stator teeth and the rotor part, and g1 is not equal to g2. The motor is configured to have an arrangement mode including a plurality of types of stator tooth structures, and uniform air gap radial thicknesses formed between two types of tooth structures and a rotor part are configured to be different. The uniform equal-air-gap stator teeth arranged in this waycan effectively reduce motor torque pulsation and improve output torque, and meanwhile the uniform equal-air-gap structure can reduce manufacturing difficulty and improve manufacturing precision.

Description

technical field [0001] The invention relates to the technical field of motor equipment, in particular to a single-phase permanent magnet synchronous motor and a vacuum cleaner equipped with it. Background technique [0002] The single-phase motor has a single-phase winding, fewer switching devices are required to drive the main circuit, and the hardware cost of the control system is low. However, the magnetic field inside the single-phase motor is a pulsating magnetic field, and the electromagnetic torque of the motor has a zero point. If no specific structure is adopted, the stop position of the motor (the point where the cogging torque is 0) coincides with the point where the electromagnetic torque is 0. At this time, no matter what current is passed through, the motor cannot start, so there is a starting dead point The problem. [0003] Generally, single-phase permanent magnet motors use unequal air gaps (that is, uniform air gap radial thickness changes under the same ...

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